#!/bin/sh

# script is buggy; until patched just do exit 0
#exit 0

# add zeros to device or bus
add_zeros () {
	case "$(echo "$1" | wc -L)" in
		1)	echo "00$1" ;;
		2)	echo "0$1" ;;
		*)	echo "$1"
	esac
	exit 0
}


# bus and device dirs in /sys
USB_PATH=$(echo "${MDEV}" | sed -e 's/usbdev\([0-9]\).[0-9]/usb\1/')
USB_PATH=$(find /sys/devices -type d -name "${USB_PATH}")
USB_DEV_DIR=$(echo "${MDEV}" | sed -e 's/usbdev\([0-9]\).\([0-9]\)/\1-\2/')

# dir names in /dev
BUS=$(add_zeros "$(echo "${MDEV}" | sed -e 's/^usbdev\([0-9]\).[0-9]/\1/')")
USB_DEV=$(add_zeros "$(echo "${MDEV}" | sed -e 's/^usbdev[0-9].\([0-9]\)/\1/')")


# try to load the proper driver for usb devices
case "${ACTION}" in
	add|"")
		# load usb bus driver
		for i in "${USB_PATH}"/*/modalias ; do
			modprobe "$(cat "$i")" 2>/dev/null
		done
		# load usb device driver if existent
		if [ -d "${USB_PATH}/${USB_DEV_DIR}" ]; then
			for i in "${USB_PATH}/${USB_DEV_DIR}"/*/modalias ; do
				modprobe "$(cat "$i")" 2>/dev/null
			done
		fi
		# move usb device file
		mkdir -p "bus/usb/${BUS}"
		mv "${MDEV}" "bus/usb/${BUS}/${USB_DEV}"
		;;
	remove)
		# unload device driver, if device dir is existent
		if [ -d "${USB_PATH}/${USB_DEV_DIR}" ]; then
			for i in "${USB_PATH}/${USB_DEV_DIR}"/*/modalias ; do
				modprobe -r "$(cat "$i")" 2>/dev/null
		done
		fi
		# unload usb bus driver. Does this make sense?
		# what happens, if two usb devices are plugged in
		# and one is removed?
		for i in "${USB_PATH}"/*/modalias ; do
			modprobe -r "$(cat "$i")" 2>/dev/null
		done
		# remove device file and possible empty dirs
		rm -f "bus/usb/${BUS}/${USB_DEV}"
		rmdir "bus/usb/${BUS}/" 2>/dev/null
		rmdir bus/usb/ 2>/dev/null
		rmdir bus/ 2>/dev/null
esac
